High voltage transmission class 10 | 10th class physics ch 15 high voltage transmission | Urdu скачать в хорошем качестве

High voltage transmission class 10 | 10th class physics ch 15 high voltage transmission | Urdu

High voltage transmission 10th class physics ch 15 | high voltage transmission physics wallah sabaq in urdu hindi 15.10 HIGH VOLTAGE TRANSMISSION Electric power is usually generated at places which are far from the places where it is consumed. The power is transmitted over long distances at high voltage to minimize the loss of energy in the form of heat during transmission. As heat dissipated in the 2 transmission cable of resistance R is I Rt. Hence, by reducing the current through the cable, power loss in the form of heat dissipation can also be reduced. So the alternating voltage is stepped up at the generating station. It is then transmitted to the main sub-station. This voltage is stepped down and is transmitted to the switching transformer station or the city sub-station. At the city sub station, it is further stepped down to 220 V and supplied to the consumers. A schematic diagram of high voltage transmission is shown in Fig. 15.20